By-pass and filter connection



Sept. 10, 1929. cH N 1,727,808

BY-PASS AND FILTER CONNECTION Filed May 6. 1927 75 M '0 4 Q0 Kw PatentedSept. 111,192.9-

U ITED STATES PATENT OFFICE.

ALBERT CHAMPION, OF FLINT, MICHIGAN, ASSIGNOR TO A C SPARK PLUG COMPANY,

- OF FLINT, MICHIGAN, COMPANY OF MICHIGAN.

BY-PASS. AND FILTER CONNECTION.

Application filed may e, 1927. [serial No. 189,346.

' This invention relates to oil filters and particularly to the mannerof'connecting the v structure embodying the by-pass valve to the filtercover.

In the past it has been customary to attach the by-pass structure to thefilter cover by means of one or more bolts and by the use of a gasketbetween the byass and the filter cover. It is the object o the presentin-.

in vention to eliminate these bolts and gasket and to this end I castthe by-pass structure into the cover of the filter. This will eifectively eliminate all leaks between the cover and by-pass structure and avoidthe useof bolts and gaskets. I

Preferably in casting the by-pass into the cover, allowance is made fora relatively heavy plate at the inside of the cover to serve as areinforcing means for the cover and bypass structure.

The invention is disclosed in the accompanying drawing in which:

Fig. 1 is a transverse sectional view through an oil filter on the line11 of Fig. 2. Fig. 2 is a sectional view on the line 2-2 of Flg. 1.

Fig. 3 is a plan view of the structure of Fi 1. Feferring to thenumbered parts on the drawing, 10 indicates an oil filter can, 11 thefiltering material-and 12 the cover thereof. The cover 12 is providedwith a plurality of openings 13, 14 and 15 serving respectively asoutlet, inlet and by-pass openings. The by-pass structure of the presentinvention is cast into the cover and is indicated as a whole at 16 andcomprises the outlet pas-- sage 17, inlet passage 18 and by-pass conduit19. The outlet assage 17 is controlled by a valve 20 and tfi e by-passconduit 19 by a spring pressed ball valve 21. Any suitable form or moldmay beused in the casting operation. Y

The. general configuration of the by-pass structure is shown n ,dottedoutline at 24 pass passage 19.

in Fig. 2 and in casting the structure into the cover, allowance is madefor a relatively thick and broad inner reinforcing plate 22 which willreinforce and strengthen the cover 12. The casting of the by-pass intothe cover gives a very intimate contact at the meeting surfaces as shownat 23 which results in the elimination of the usual gasket and preventsleakage. V

From Figs. 1 and 2 it will be notedthat the by-pass structure has asubstantial portion of its area both above and below the cover 12,thereby forming a very secure connection and resulting in theelimination of all securing bolts. 1 In Fig. 3 the by-pass conduit 19 isshown in dotted outline leading from the inlet 18, past the ball valve'21 and through the opening 15 in the cover 12.v This conduit permitsthe oil to flow to the outlet passage 17 when it cannot flow through thefilter. When the back pressure of the filter exceeds the pressure of thesprin 24:, the ball valve 21 will be unseated and a1 ow the oil to passthrough the by- I clalm:

1. In an oil filter, a cover, and a by-pass structure cast into saidcover.

v 2. In an oil filter,.a cover having a plurality of openings, anda-by-pass structure cast into said opemngs and cover.

3. In an oil filter, a cover, a by-pass structure cast into said cover,-and a reinforcing plate on the inside of said cover.' I

4. The structure of claim 3, said reinforcing plate being integral withsaid by -pass structure.

5. In 'an oil filter, a cover, and a by-pass structure cast into saidcover, said by-pass structure having a plurality of passages.

6. In an oil filter, a cover, and a by-pass structure cast centrallyinto said cover.

7. In an oil filter, a cover and aby-pass structure cast into said coverand extending a substantial distance Over both sides of said cover.

8. The structure of claim 7, said extensions forming the sole means forholding said by 5 pass on said cover.

9. In an oil filter, a cover and a by-pass structure cast into saidcover and forming the sole connecting means between the cover andby-pass structure. 10. In an oil filter, a cover having a centralopening and a plurality of noncentral openings, and a by-pass -structurecast into said cover and openings and extending on both sides of saidcover. In testimony whereof I aflix my-signature.

' ALBERT CHAMPION.

